Fig. 1. Measuring target radiation of infrared radiometer direct measurement method

Fig. 2. Convolutional neural network model of encoder-decoder architecture

Fig. 3. Encoder-decoder CNN model training flowchart

Fig. 4. Infrared radiometer calibration flowchart

Fig. 5. Experiment device of infrared radiometer calibration

Fig. 6. Infrared radiometer calibration results

Fig. 7. Atmospheric transmittance and atmospheric path radiation at different distances

Fig. 8. Calculation results of atmospheric transmittance and atmospheric path radiation with different methods

Fig. 9. Comparison of radiative inversion results with different methods

Fig. 10. Errors of radiative inversion results with different methods